Placeholder¶

Bases: _variable.Variable

Placeholder variable.

Variables for pouring in data when converting to QUBO or to MIP. When using the Placeholder class, you can specify the specific value to be placed in the Placeholder by using the ph_value argument of methods such as .to_pyqubo and .to_lp of the Problem class. If you want to handle array data that cannot be defined with shape (called jagged array), you can use the JaggedArray class.

import jijmodeling as jm
d = jm.Placeholder("d", ndim=2)
d.ndim
# 2

Bases: Placeholder

Shape of variable.

import jijmodeling as jm
d = jm.Placeholder("d", dim=1)
n = d.shape[0]
print(type(n))
# <class 'ArrayShape'>